<?php

/**
 * mForge Framework
 *
 * LICENSE:
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * The license is bundled with this package in the file LICENSE.txt.
 * You may also obtain a copy of the License at this URL:
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @copyright  Copyright (c) 2011, Jonathan Hedrén
 * @author     Jonathan Hedrén <jonathan.hedren@gmail.com>
 * @license    http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
 */

namespace mForge\Modules\Menu;

class Menu
{
    /**
     *
     * @var array
     */
    private $menuItems = array();

    /**
     *
     * @param array $menuItems
     * @return Menu
     */
    public function __construct(array $menuItems = array())
    {
        $this->addMenuItems($menuItems);
        return $this;
    }

    /**
     *
     * @param MenuItem $menuItem
     * @return Menu
     */
    public function addMenuItem(MenuItem $menuItem)
    {
        $this->menuItems[$menuItem->getId()] = $menuItem;
        return $this;
    }

    /**
     *
     * @param array $menuItems
     * @return Menu
     */
    public function addMenuItems(array $menuItems)
    {
        foreach ($menuItems as $menuItem) {
            $this->menuItems[$menuItem->getId()] = $menuItem;
        }
        return $this;
    }

    /**
     *
     * @return MenuItem
     */
    public function getActiveMenuItem()
    {
        foreach ($this->menuItems as $menuItem) {
            if ($menuItem->isActive()) {
                return $menuItem;
            }
        }
        return null;
    }

    /**
     *
     * @param string $id
     * @return MenuItem
     */
    public function getMenuItem($id)
    {
        return isset($this->menuItems[$id]) ? $this->menuItems[$id] : null;
    }

    /**
     *
     * @return array
     */
    public function getMenuItems()
    {
        return $this->menuItems;
    }

    /**
     *
     * @param string $id
     * @return Menu
     */
    public function removeMenuItem($id)
    {
        if (!isset($this->menuItems[$id])) {
            throw new \Exception('The MenuItem with id "' . $id . '" is missing.');
        }
        unset($this->menuItems[$id]);
        return $this;
    }
}
